r4in

I think it'd be easy to explain what's goin on in a timeline

-Last june (summerish) Got a new exhaust system. Ebay.

- Since then I've noticed slight, gradual power loss

- When it started to get cold here. Car wouldn't start , Checked the dipstick and it said there was NO oil in the car.

- Added oil

- Car runs

- Check the dipstick. The dipstick is WAYYY over the oil marker. way over.

-Car struggles to pick up speed. I'll press the pedal till 5k rpms and i'll hardly get anywhere. Even if I shift gears. it'll struggle to pick up speed and it's as if EVERY gear is first gear... with no power.

- Drained and changed the oil + filter.

- Intake filter dirty AF, even bent in some areas

- Went to check CEL. They told me it was P1457 P0134 , Gas cap and 02 sensor.

Could it be possible that the 02 sensor is from the new exhaust that got installed? But if that's the case how come it took months for this problem to kick in?

Any input is greatly appreciated. thank you

SleeperGSR

Sounds like an ep3 problem to me. I feel like best solution here is K20A2, ok bad jokes aside.

how long did you run with no oil? That was really bad, could be some damage from this.

Why did you overfill? can be just as bad as no enough, this also could have done damage.

Did you get a new AF? sounds like you need one.

Most likely the o2 sensor problems are from you exhaust mod, probably need new ones. get a new AF too..

Type-Spaz

sounds like a neglected engine....

vrrodri

I think you need to do a compression test and see if you have decent compression...I would start there and then pull the plugs and see how they look, see if you have any CELs stored if your CEL dash light is out it might be on already